Seismicity before and after the two great Sumatra earthquakes of 2004 and 2005

• Autorzy: Gibowicz S. , Dębski W.
• Języki publikacji: EN

Abstrakty

EN

The Harvard CMT catalogue contains 481 shallow earthquakes that occurred between 1 January 1977 and 30 November 2005 within a broad region defined by the geographical latitude from 3°S to 14°N and by the longitude from 91°E to 102°E. There are 230 events that occurred before the great earthquake of 26 December 2004. Their surface distribution is not uniform and the source area of the 2004 great event appears as an area of seismic quiescence with a radius of about 100 km. There are 186 events that occurred between the two great earthquakes of 26 December 2004 and 28 March 2005. Practically all of them are located to the northwest from the great earthquake of 2005, that in turn was followed by 63 events, mostly located to the southeast. The cumulative seismic moment from earthquakes before the occurrence of the great event of 2004 increased rather regularly with time, with sudden increase about twenty years and two years before the occurrence of the great event. The seismic moment of earthquakes between the two great events increased rapidly during the first ten-fifteen days, then flattened out and increased slowly with time. After the great event of 2005 the seismic moment shows quiet increase during some 115 days, then sudden jump, followed by very small activity till the end of our observations. From the spatial distribution of seismic moment of earthquakes that occurred before the great event of 2004 it follows that its largest release appeared to the southeast from the great event, around the rupture area of the great earthquake of 2005. The largest release of seismic moment from earthquakes between the two great events is observed in the vicinity of the 2004 event and further up to the north. The seismic moment from earthquakes that occurred after the great event of 2005 was mostly released in its vicinity and further down to the south.

Słowa kluczowe

EN

Harvard CMT catalogue; Sumatra-Andaman seismic region; seismic quiescence; seismic moment release; earthquake doublets and multiplets

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2006
• Tom: Vol. 54, no. 4
• Strony: 343--360

Twórcy

autor

Gibowicz S.

autor

Dębski W.

• Institute of Geophysics, Polish Academy of Sciences ul. Księcia Janusza 64, 01-452 Warszawa, Poland,

Bibliografia

• Ammon, C.J., C. Ji, H.-K. Thio, D. Robinson, S. Ni, V. Hjorleifsdottir, H. Kanamori, T. Lay, S. Das, D. Helmberger, G. Ichinose, J. Polet, and D. Wald, 2005, Rupture process of the 2004 Sumatra-Andaman earthquake, Science 308, 1133-1139.
• Banerjee, P., F. F. Pollitz, and R. Bürgmann, 2005, The size and duration of the Sumatra-Andaman earthquake from far-field static offsets, Science 308, 1769-1772.
• Bath, M., 1965, Lateral inhomogeneities in the upper mantle, Tectonophysics 2, 483-514.
• Catherine, J. K., V. K. Gahalaut, and V. K. Sahu, 2005, Constraints on rupture of the December 26, 2004, Sumatra earthquake from far-field GPS observations, Earth Planet. Sci. Lett. 237, 673-679.
• Dasgupta, S., M. Mukhopadhyay, A. Bhattacharya and T. K. Jana, 2003, The geometry of the Burmese-Andaman subducting lithosphere, J. Seism. 7, 155-174.
• Dasgupta S., B. Mukhopadhyay and A. Acharyya, 2005, Aftershock propagation characteristics during the first three hours following the 26 December 2004 Sumatra-Andaman earthquake, Gondwana Res. 8, 585-588.
• Dziewonski, A. M., and J.H. Woodhouse, 1983, An experiment in systematic study of global seismicity: Centroid-moment tensor solutions for 201 moderate and large earthquakes of 1981, J. Geophys. Res. 88, 3247-3271.
• Dziewonski, A. M., T.-A. Chou, and J.H. Woodhouse, 1981, Determination of earthquake source parameters from waveform data for studies of global and regional seismicity, J. Geophys. Res. 86, 2825-2852.
• Felzer, K.R., R.E. Abercrombie and G. Ekström, 2004, A common origin for aftershocks, foreshocks, and multiplets, Bull. Seism. Soc. Am. 94, 88-98.
• Gibowicz, S.J., and S. Lasocki, 2005, Earthquake doublets and multiplets in the Fiji-Tonga-Kermadec region, Acta Geophys. Pol. 53, 239-274.
• Ishii, M., P.M. Shearer, H. Houston and J. E. Vidale, 2005, Extent, duration and speed of the 2004 Sumatra-Andaman earthquake imaged by the Hi-Net array, Nature 435, 933-936.
• Kagan, Y.Y., 1991, 3-D rotation of double-couple earthquake sources, Geophys. J. Int. 106, 709-716.
• Kagan, Y.Y., 1992, Correlations of earthquake focal mechanisms, Geophys. J. Int. 110, 305-320.
• Kagan, Y.Y., and D.D. Jackson, 1999, Worldwide doublets of large earthquakes, Bull. Seism. Soc. Am. 89, 1147-1155.
• Kennett, B.L.N., and P.R. Cummins, 2005, The relationship of the seismic source and subduction zone structure for the 2004 December 26 Sumatra-Andaman earthquake, Earth Planet. Sci. Lett. 239, 1-8.
• Krüger, F., and M. Ohrnberger, 2005, Tracking the rupture of the Mw = 9.3 Sumatra earthquake over 1,150 km at teleseismic distance, Nature 435, 937-939.
• Lay, T., H. Kanamori, C.J. Ammon, M. Nettles, S.N. Ward, R.C. Aster, S.L. Beck, S.L. Bilek, M.R. Brudzinski, R. Butler, H.R. DeShon, G. Ekström, K. Satake and S. Sipkin, 2005, The great Sumatra-Andaman earthquake of 26 December 2004, Science 308, 1127-1133.
• McCloskey, J., S.S. Nalbant and S. Steacy, 2005, Earthquake risk from co-seismic stress, Nature 434, 291.
• Ni, S., H. Kanamori and D. Helmberger, 2005, Energy radiation from the Sumatra earthquake, Nature 434, 582.
• Nuannin, P., O. Kulhanek and L. Persson, 2005, Spatial and temporal b value anomalies preceding the devastating off coast of NW Sumatra earthquake of December 26, 2004, Geophys. Res. Lett. 32, L11307, doi: 10.1029/2005GL022679.
• Park, J., T.-R.A. Song, J. Tromp, E. Okal, S. Stein, G. Roult, E. Clevede, G. Laske, H. Kanamori, P. Davis, J. Berger, C. Braitenberg, M. Van Camp, X. Lei, H. Sun, H. Xu and S. Rosat, 2005, Earth's free oscillations excited by the 26 December 2004 Sumatra-Andaman earthquake, Science 308, 1139-1144.
• Stein, S., and E.A. Okal, 2005, Speed and size of the Sumatra earthquake, Nature 434, 581-582.
• Tsai, V.C., M. Nettles, G. Ekström and A.M. Dziewonski, 2005, Multiple CMT source analysis of the 2004 Sumatra earthquake, Geophys. Res. Lett. 32, 17304,doi: 10.1029/2005GL023813.
• Vigny, C., W.J.F. Simons, S. Abu, R. Bamphenyu, C. Satirapod, N. Choosakul, C. Subarya, A. Socquet, K. Omar, H.Z. Abidin and B.A.C. Ambrosius, 2005, Insight into the 2004 Sumatra-Andaman earthquake from GPS measurements in southeast Asia, Nature 436, 201-206.
• Wells, D.L., and K.J. Coppersmith, 1994, New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement, Bull. Seism. Soc. Am. 84, 974-1002.
• Wessel, P., and W.H.F. Smith, 1995, New version of the Generic Mapping Tools released, EOS Trans. AGU 76, 329.